docs(migration): browser recovery — manual Web Store reinstall path

Re-declaring is optional; ids are stable so restored data reattaches
on a plain Web Store reinstall too.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/MIGRATION.md

@@ -274,11 +274,12 @@ default yet.
   treats every extension as externally uninstalled and deletes it
   **together with its stored data** (`Local Extension Settings` —
   wallet vaults, password-manager pairings). Bookmarks survive, which
-  makes it look minor; it isn't. Recovery: re-declare the extension
-  ids, close the browser, and copy `Default/Local Extension
-  Settings/<id>` (plus any `Default/IndexedDB/chrome-extension_<id>_*`)
-  back from your Phase-0 `pre-nomarchy-home` snapshot before
-  relaunching.
+  makes it look minor; it isn't. Recovery: close the browser, copy
+  `Default/Local Extension Settings/<id>` (plus any
+  `Default/IndexedDB/chrome-extension_<id>_*`) back from your Phase-0
+  `pre-nomarchy-home` snapshot, then reinstall each extension — from
+  the Web Store (ids are stable, so the data reattaches) or by
+  re-declaring the ids if you want them declarative again.
 - **VPN:** NetworkManager connections survive under
   `/etc/NetworkManager` and your home. System › VPN lists NM
   `vpn`/`wireguard` profiles; import any that lived outside NM.